CN216584374U - Three-chamber bioelectrochemical device for treating high-salinity wastewater - Google Patents
Three-chamber bioelectrochemical device for treating high-salinity wastewater Download PDFInfo
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Abstract
The utility model discloses a handle three room bioelectrochemistry devices of high salt waste water, it includes anode chamber, desalination chamber, cathode chamber, set up the cation exchange membrane between cathode chamber and desalination chamber, set up the anion exchange membrane between desalination chamber and anode chamber, hang the carbon fiber brush positive pole in the middle part of the anode chamber, hang the air cathode in the middle part of the cathode chamber, variable resistance, DC power supply, control system and anode chamber feed liquor pump, anode chamber liquid outlet pump, desalination chamber feed liquor pump, desalination chamber liquid outlet pump, cathode chamber feed liquor pump, cathode chamber liquid outlet pump, desalination chamber respectively with the anode chamber, the cathode chamber communicates, carbon fiber brush positive pole, DC power supply, variable resistance and air cathode connect gradually; the control system is used for monitoring the voltage of the direct-current power supply in real time and is in communication connection with the pumps respectively, the device does not need to be regulated and controlled manually, can automatically replace the anode and the catholyte, is more convenient and efficient, and changes intermittent operation into continuous operation to a certain extent.
Description
Technical Field
The utility model relates to a microbial electrochemical technology field, concretely relates to handle three room bioelectrochemical devices of high salt waste water.
Background
High salt industrial waste water generally has a salt content of more than 1 percent and contains a large amount of free metal cations and non-metal anions, such as Na+、Ca2+、Cl-、SO4 2-Etc., while also containing a large amount of soluble inorganic salts. The content of high-salinity wastewater in China accounts for 5 percent of the total wastewater, and the high-salinity wastewater is increased at a speed of 2 percent every year. High-concentration salt in the wastewater can inhibit the activity of activated sludge, so that the efficiency of a wastewater biochemical treatment system is low, and the high-salt industrial wastewater needs to be subjected to desalination pretreatment. The common desalination methods include thermal separation, reverse osmosis, membrane exchange, capacitive deionization, electrodialysis, electro-adsorption, and microbial desalination, but the conventional desalination process usually consumes a large amount of energy and requires high water pressure.
The microbial desalting pond is an expansion form of a bioelectrochemical system, and the principle of the microbial desalting pond is that anode breathing bacteria transfer electrons generated by oxidizing organic matters to the outside of cells so as to generate electric energy, and the process can be carried out under the condition of no external power supply. The microbial desalting tank has the advantages of low water quality requirement, simple equipment structure, resource utilization and the like. When the microbial desalting tank is used for treating high-salinity wastewater, when the voltage is lower than 100mV, the period is considered to be finished, the anolyte and the desalting chamber saline need to be replaced, but the process is usually monitored manually, and the replacement consumes time and labor.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, providing a modified handle high salt waste water's three room bioelectrochemistry devices, the device need not artificially to regulate and control, can automize and carry out the change of positive pole and catholyte, and is more convenient, high-efficient, becomes "continuous operation" with intermittent type operation to a certain extent.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a three-chamber bioelectrochemical device for treating high-salinity wastewater comprises an anode chamber, a desalting chamber, a cathode chamber, a cation exchange membrane, an anion exchange membrane, a carbon fiber brush anode, an air cathode, a variable resistor, a direct current power supply and a control system; wherein the desalting chamber is respectively communicated with the anode chamber and the cathode chamber, the cation exchange membrane is arranged between the cathode chamber and the desalting chamber, the anion exchange membrane is arranged between the desalting chamber and the anode chamber, the carbon fiber brush anode is suspended in the middle of the anode chamber, the air cathode is suspended in the middle of the cathode chamber, and the carbon fiber brush anode, the direct current power supply, the variable resistor and the air cathode are sequentially connected;
the three-compartment bioelectrochemical device further includes: an anode chamber liquid inlet pump and an anode chamber liquid outlet pump which are respectively communicated with the anode chamber, a desalination chamber liquid inlet pump and a desalination chamber liquid outlet pump which are respectively communicated with the desalination chamber, and a cathode chamber liquid inlet pump and a cathode chamber liquid outlet pump which are respectively communicated with the cathode chamber;
control system is used for real-time supervision DC power supply's voltage, just control system respectively with anode chamber feed liquor pump the anode chamber goes out the liquid pump desalination chamber feed liquor pump desalination chamber goes out the liquid pump cathode chamber feed liquor pump cathode chamber goes out liquid pump communication connection.
According to some preferred aspects of the invention, the air cathode is made of carbon cloth.
According to some preferred aspects of the present invention, the anode chamber, the desalination chamber and the cathode chamber are respectively cylindrical bottles, the height-diameter ratio of the cylindrical bottles is 2-4: 1, and the cylindrical bottles are made of organic glass.
According to some preferred aspects of the present invention, the three-compartment bioelectrochemical device further comprises a reference electrode for monitoring the potential of the air cathode, the reference electrode being disposed in the cathode compartment.
According to some preferred aspects of the present invention, the three-chamber bio-electrochemical device further comprises a stirring mechanism, the stirring mechanism comprises a magnetic stirrer disposed in the anode chamber and a magnetic stirrer disposed in the bottom of the anode chamber and used for driving the magnetic stirrer to move through magnetism.
According to some preferred aspects of the present invention, the three-chamber bioelectrochemical device further comprises an aeration mechanism including an aeration tube introduced into the bottom of the cathode chamber and an oxygenation pump communicated with the aeration tube.
According to some preferred aspects of the present invention, the carbon fiber brush anode, the dc power supply, the variable resistor and the air cathode are connected in sequence through a titanium rod or a titanium wire, respectively.
According to some preferred and specific aspects of the present invention, the variable resistor is a box resistor having a resistance value ranging from 0 to 1000 Ω.
According to some preferred aspects of the present invention, the anode chamber is a sealed structure, and the three-chamber bioelectrochemical device further includes a nitrogen gas supply mechanism that communicates with the inside of the anode chamber.
According to some preferred aspects of the present invention, the anode chamber liquid inlet pump is in communication with an upper portion of the anode chamber, and the anode chamber liquid outlet pump is in communication with a lower portion of the anode chamber; the desalting chamber liquid inlet pump is communicated with the upper part of the desalting chamber, and the desalting chamber liquid outlet pump is communicated with the lower part of the desalting chamber; the cathode chamber liquid inlet pump is communicated with the upper part of the cathode chamber, and the cathode chamber liquid outlet pump is communicated with the lower part of the cathode chamber.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses the biological electrochemical device of three rooms of high salt waste water of modified processing can need not artificial regulation and control, can automize and carry out the change of positive pole and catholyte, and whole reaction unit is more convenient, high-efficient, and to a certain extent becomes "continuous operation" with intermittent type operation and can also be on the basis of high-efficient desalination, degradation positive pole COD, automated control business turn over water, increases its feasibility in the in-service use, reduces the human labor and avoids the operation of manpower hysteresis quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a three-chamber bioelectrochemical device for treating high-salinity wastewater according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection relationship between the control system and each liquid inlet pump and each liquid outlet pump;
wherein, 1, anode chamber; 2. a desalting chamber; 3. a cathode chamber; 4. carbon fiber brush anodes; 5. an air cathode; 6. a reference electrode; 7. an anion exchange membrane; 8. a cation exchange membrane; 9. a liquid inlet; 10. a liquid outlet; 11. a magnetic stirrer; 12. a magnetic stirrer; 13. an oxygenation pump; 14. a box-type resistor; 15. a direct current power supply; 16. a control system; 17. an anode chamber liquid inlet pump; 18. a liquid outlet pump of the anode chamber; 19. a liquid inlet pump of the desalting chamber; 20. a liquid outlet pump of the desalting chamber; 21. a cathode chamber liquid inlet pump; 22. the cathode chamber is provided with a liquid outlet pump.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the present example provides a three-chamber bioelectrochemical device for treating high salinity wastewater, which comprises an anode chamber 1, a desalination chamber 2, a cathode chamber 3, a carbon fiber brush anode 4, an air cathode 5, an anion exchange membrane 7, a cation exchange membrane 8, a variable resistor, a direct current power supply 15, and a control system 16; the desalination device comprises a desalination chamber 2, a cathode chamber 1, a cation exchange membrane 8, an anion exchange membrane 7, a carbon fiber brush anode 4, an air cathode 5, a carbon fiber brush anode 4, a direct-current power supply 15, a variable resistor and the air cathode 5, wherein the desalination chamber 2 is respectively communicated with the anode chamber 1 and the cathode chamber 3, the cation exchange membrane 8 is arranged between the cathode chamber 3 and the desalination chamber 2, the anion exchange membrane 7 is arranged between the desalination chamber 2 and the anode chamber 1, the carbon fiber brush anode 4 is suspended in the middle of the anode chamber 1, and the air cathode 5 is suspended in the middle of the cathode chamber 3;
the three-chamber bioelectrochemical device further includes: an anode chamber liquid inlet pump 17 and an anode chamber liquid outlet pump 18 which are respectively communicated with the anode chamber 1, a desalination chamber liquid inlet pump 19 and a desalination chamber liquid outlet pump 20 which are respectively communicated with the desalination chamber 2, and a cathode chamber liquid inlet pump 21 and a cathode chamber liquid outlet pump 22 which are respectively communicated with the cathode chamber 3;
the control system 16 is used for monitoring the voltage of the direct current power supply 15 in real time, and the control system 16 is respectively in communication connection with an anode chamber liquid inlet pump 17, an anode chamber liquid outlet pump 18, a desalination chamber liquid inlet pump 19, a desalination chamber liquid outlet pump 20, a cathode chamber liquid inlet pump 21 and a cathode chamber liquid outlet pump 22.
The control system 16 in this example is a conventional control system, for example, a conventional voltage monitoring circuit is used to communicate with a conventional control unit, the monitored voltage is compared with a threshold voltage (in this example, the threshold voltage is 100 mV), when the monitored voltage is lower than 100mV, it is determined that a treatment cycle is finished and the anolyte and the desalted chamber brine are to be replaced, the control unit sends signals to the anode chamber liquid inlet pump 17, the anode chamber liquid outlet pump 18, the desalted chamber liquid inlet pump 19, the desalted chamber liquid outlet pump 20, the cathode chamber liquid inlet pump 21 and the cathode chamber liquid outlet pump 22, so that the anode chamber liquid outlet pump 18, the desalted chamber liquid outlet pump 20 and the cathode chamber liquid outlet pump 22 are turned on to discharge the respective liquids, after the discharging is finished (the discharging time can be set in advance), the anode chamber liquid outlet pump 18, the desalted chamber liquid outlet pump 20 and the cathode chamber liquid outlet pump 22 are turned off, then the control unit gives out signals to enable the anode chamber liquid inlet pump 17, the desalting chamber liquid inlet pump 19 and the cathode chamber liquid inlet pump 21 to be respectively opened, liquid inlet is started, liquid inlet speed and liquid inlet time are set in advance until a set amount is reached, the processes can be set in the control unit through a program edited in advance, the program setting mode is the prior art, and detailed description is omitted here. In the embodiment, the functions of the control system 16 are organically combined with other components, so that the automatic control of liquid inlet and outlet according to voltage feedback is realized, and the time consumption and the hysteresis of manual operation are reduced.
In this example, in the initial stage of the operation of the three-chamber bioelectrochemical apparatus for treating high salinity wastewater, the dc power supply 15 is operated to connect the circuit and operate the apparatus, and as time passes, the electric power of the dc power supply 15 is gradually exhausted, and when the voltages at both ends of the dc power supply 15 are detected again by the control system 16, the voltages of the positive electrode and the negative electrode can be obtained.
Meanwhile, in this example, as shown in fig. 1, for the convenience of understanding, the liquid inlet 9 and the liquid outlet 10 of each of the three components of the anode chamber 1, the desalination chamber 2 and the cathode chamber 3 are denoted by the same reference numerals, and the pumps connected and communicated with each other are denoted by different reference numerals, so as to facilitate the expression and the corresponding distinction.
In this example, the air cathode 5 is made of carbon cloth, and the carbon cloth may be folded and pressed, and both folding and pressing may be performed by a conventional method, or the air cathode 5 made of commercially available carbon cloth may be directly used.
In this example, the anode chamber 1, the desalination chamber 2 and the cathode chamber 3 are respectively cylindrical bottles, the height-diameter ratio of the cylindrical bottles is 2-4: 1, and the cylindrical bottles are made of organic glass, so that the cylindrical bottles are corrosion-resistant and convenient to observe.
In this example, the three-compartment bioelectrochemical device further comprises a reference electrode 6 for monitoring the potential of the air cathode 5, the reference electrode 6 being arranged in the cathode compartment 3. Reference electrode 6 was a saturated calomel electrode (SCE +245 mV vs standard hydrogen electrode SHE, model-217) and the cathode potential was monitored with reference electrode 6 and the potential and current were recorded every 10 min.
In this example, the three-chamber bioelectrochemical device further includes a stirring mechanism, and the stirring mechanism includes a magnetic stirrer 11 disposed in the anode chamber 1 and a magnetic stirrer 12 located at the bottom of the anode chamber 1 and configured to magnetically drive the magnetic stirrer 11 to move.
In this example, the three-chamber bioelectrochemical apparatus further comprises an aeration means including an aeration tube which is introduced into the bottom of the cathode chamber 3 and an aeration pump 13 which is connected to the aeration tube, and the cathode dissolved oxygen concentration is controlled to 6.0 mg/L or more by the aeration means.
In this example, the carbon fiber brush anode 4, the dc power supply 15, the variable resistor, and the air cathode 5 are connected in sequence via a titanium rod or a titanium wire, respectively.
In this example, the variable resistor is a box resistor 14, and the resistance value of the box resistor 14 ranges from 0 Ω to 1000 Ω.
In this example, the anode chamber 1 is a sealed structure, and the three-chamber bioelectrochemical device further includes a nitrogen gas supply mechanism, which is communicated with the inside of the anode chamber 1, and can create an anaerobic environment by introducing nitrogen gas.
In this example, an anode chamber liquid inlet pump 17 is communicated with the upper part of the anode chamber 1, and an anode chamber liquid outlet pump 18 is communicated with the lower part of the anode chamber 1; a liquid inlet pump 19 of the desalting chamber is communicated with the upper part of the desalting chamber 2, and a liquid outlet pump 20 of the desalting chamber is communicated with the lower part of the desalting chamber 2; the cathode chamber liquid inlet pump 21 is communicated with the upper part of the cathode chamber 3, and the cathode chamber liquid outlet pump 22 is communicated with the lower part of the cathode chamber 3.
Further, the following provides three specific application examples, which further examine the treatment effect:
application example 1:
adopting a three-chamber bioelectrochemical reaction chamber with the effective volume of 900 mL, brushing an anode 4 by a carbon fiber with the diameter of phi 5cm multiplied by L6 cm, brushing an air cathode 5 and taking a saturated calomel electrode (model-217) as a reference electrode 6; the titanium rod bound with the carbon fiber brush anode 4 and the titanium wire led out from the air cathode 5 are both used for connecting an external circuit; the cathode chamber 3 is connected with an oxygenation pump 13. A box-type resistor 14 is connected in the circuit, and a data recorder records the potential and the current of the air cathode 5 every 10 min; the anode chamber 1 is sealed by an acrylic plate and is sealed by N2Blowing off for 30 min to create an anaerobic environment. The anode chamber 1 is internally provided with a magnetic stirrer 11 which is arranged in a magnetic stirrerAnd a mixer 12.
Inoculating secondary sedimentation tank sludge with sludge concentration (MLSS) of 5-6 g/L, sealing and placing in a water bath kettle for constant temperature oscillation at 30 ℃, and obtaining anaerobic activated sludge as anode chamber inoculation liquid after several days. The anolyte contains C6H12O6 0.56g/L（COD≈600 mg/L）、KH2PO4 4.40g/L、K2HPO43.40g/L and NH4Cl 0.32 g/L. The cathode chamber 3 contains sodium bicarbonate as nutrient substance, and the catholyte contains NaHCO3 1.92 g/L、KH2PO4 4.40 g/L、K2HPO43.40g/L and NH4Cl 0.32 g/L. The desalting chamber 2 simulates the high-salinity wastewater inlet water of the desalting chamber by 35 g/L NaCl solution.
Under the conditions of anaerobic reaction in the anode chamber 1, room temperature, constant resistance circuit, inlet water pH of 7.23 +/-0.20 and dissolved oxygen in the cathode chamber of more than 6.0g/L, starting the reactor, replacing the substrate solution when the voltage in the period is reduced to be less than 100mV, and finishing the starting when the maximum voltage is basically the same in two to three continuous periods.
The electrode distance between the anode and cathode chambers is 10 cm. During the start-up phase, the resistance of the external box resistor 14 is adjusted from 1000 Ω to 50 Ω (1000 Ω, 500 Ω, 300 Ω, 100 Ω, 50 Ω) to obtain a polarization curve and a power curve, the maximum power density obtained by the reactor being 180.0 mW/m3The internal resistance is 610.5 Ω. After steady operation, the reactor voltage peaked at 590 mV at 10 d. The removal rate of the chemical oxygen demand in the anode substrate solution is 66.03 +/-0.10%, and the maximum removal rate of NaCl in the desalting chamber 2 is 84.66 +/-0.10%.
Application example 2
The difference from application example 1 is that the electrode distance between the anode and cathode chambers was changed to 12 cm. The maximum power density achieved by the reactor during the start-up phase was 214.5 mW/m3The internal resistance is 516.5 Ω. After steady operation, the reactor voltage peaked at 645 mV at 12 d. The removal rate of the chemical oxygen demand in the anode substrate solution is 71.70 +/-0.20%, and the maximum removal rate of NaCl in the desalting chamber is 87.70 +/-0.10%. Compared with example 1, the maximum power density is improved by 19.2%, and the peak voltage is improved by 9.3%. Anode COD removalThe rate is improved by 8.6 percent, and the salt rejection rate is also improved by 3.5 percent.
Application example 3
The difference from application example 1 is that the electrode distance between the anode and cathode chambers was changed to 14 cm. The maximum power density achieved by the reactor during the start-up phase was 205.9 mW/m3The internal resistance was 520.7 Ω. After steady operation, the reactor voltage peaked at 610mV around 12 d. The removal rate of the chemical oxygen demand in the anode substrate solution is 69.80 +/-0.15%, and the maximum removal rate of NaCl in the desalting chamber is 83.00 +/-0.17%. Compared with example 1, the maximum power density is improved by 14.4%, and the peak voltage is improved by 3.4%. The anode COD removal rate is improved by 5.7%, but the salt removal rate is reduced by 2%. Compared with example 2, the maximum power density is reduced by 4.0%, and the peak voltage is reduced by 5.4%. The COD removal rate of the anode is reduced by 2.6 percent, and the desalination rate is also reduced by 5.4 percent.
The experimental results show that the maximum power density and peak voltage obtained in the application experimental example 2 are the maximum; the anode COD removal rate is 8.6% higher than that of the experimental example 1 and 2.7% higher than that of the application experimental example 3; the salt rejection increased by 3.5% as compared with example 1 and by 5.7% as compared with example 3. The reason is that the distance between electrodes is reduced, so that the ion migration resistance in the solution can be effectively reduced, the microbial degradation of substrates is facilitated, the internal resistance is reduced, the output power of the reactor is improved, and the reaction performance is adversely affected when the internal resistance exceeds a certain range. Changing the electrode spacing has certain influence on the anode COD and the salt chamber desalination rate, but has no significant influence.
To sum up, the utility model discloses the biological electrochemical device of three rooms of high salt waste water of modified processing can need not artificial regulation and control, can automize and carry out the change of positive pole and catholyte, and whole reaction unit is more convenient, high-efficient, and to a certain extent with intermittent type operation change "continuous operation" and can also be on the basis of high-efficient desalination, degradation positive pole COD, automated control business turn over water increases its feasibility in the in-service use, reduces the human labor and avoids the operation of manpower hysteresis nature.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The three-chamber bioelectrochemical device for treating high-salinity wastewater is characterized by comprising an anode chamber, a desalting chamber, a cathode chamber, a cation exchange membrane, an anion exchange membrane, a carbon fiber brush anode, an air cathode, a variable resistor, a direct current power supply and a control system; wherein the desalting chamber is respectively communicated with the anode chamber and the cathode chamber, the cation exchange membrane is arranged between the cathode chamber and the desalting chamber, the anion exchange membrane is arranged between the desalting chamber and the anode chamber, the carbon fiber brush anode is suspended in the middle of the anode chamber, the air cathode is suspended in the middle of the cathode chamber, and the carbon fiber brush anode, the direct current power supply, the variable resistor and the air cathode are sequentially connected;
the three-compartment bioelectrochemical device further includes: an anode chamber liquid inlet pump and an anode chamber liquid outlet pump which are respectively communicated with the anode chamber, a desalination chamber liquid inlet pump and a desalination chamber liquid outlet pump which are respectively communicated with the desalination chamber, and a cathode chamber liquid inlet pump and a cathode chamber liquid outlet pump which are respectively communicated with the cathode chamber;
control system is used for real-time supervision DC power supply's voltage, just control system respectively with anode chamber feed liquor pump the anode chamber goes out the liquid pump desalination chamber feed liquor pump desalination chamber goes out the liquid pump cathode chamber feed liquor pump cathode chamber goes out liquid pump communication connection.
2. The three-chamber bioelectrochemical device for treating high-salinity wastewater according to claim 1, wherein the air cathode is made of carbon cloth.
3. The three-chamber bioelectrochemical device according to claim 1, wherein the anode chamber, the desalination chamber and the cathode chamber are cylindrical bottles, the height-to-diameter ratio of the cylindrical bottles is 2-4: 1, and the cylindrical bottles are made of organic glass.
4. The three-compartment bio-electrochemical device for the treatment of high salinity wastewater according to claim 1, further comprising a reference electrode for monitoring the potential of said air cathode, said reference electrode being disposed in said cathode compartment.
5. The three-chamber bio-electrochemical device for treating high-salinity wastewater according to claim 1, further comprising a stirring mechanism, wherein the stirring mechanism comprises a magnetic stirrer arranged in the anode chamber and a magnetic stirrer positioned at the bottom of the anode chamber and used for magnetically driving the magnetic stirrer to move.
6. A three-compartment bioelectrochemical apparatus for treatment of high salinity wastewater according to claim 1, characterized in that it further comprises aeration means comprising an aeration pipe opening into the bottom of said cathode compartment and an oxygenation pump communicating with said aeration pipe.
7. The three-chamber bioelectrochemical device for treating high-salinity wastewater according to claim 1, wherein the carbon fiber brush anode, the direct-current power supply, the variable resistor and the air cathode are connected in sequence by a titanium rod or a titanium wire, respectively.
8. The three-compartment bio-electrochemical device for treating high salinity wastewater according to claim 1, wherein said variable resistor is a box resistor having a resistance value ranging from 0 to 1000 Ω.
9. The three-compartment bio-electrochemical device for treating high salinity wastewater according to claim 1, wherein said anode compartment is a sealed structure, said three-compartment bio-electrochemical device further comprising a nitrogen gas supply mechanism, said nitrogen gas supply mechanism being in communication with the interior of said anode compartment.
10. The three-chamber bioelectrochemical apparatus for treating high salinity wastewater according to claim 1, wherein said anode chamber liquid inlet pump is in communication with an upper portion of said anode chamber, and said anode chamber liquid outlet pump is in communication with a lower portion of said anode chamber; the desalting chamber liquid inlet pump is communicated with the upper part of the desalting chamber, and the desalting chamber liquid outlet pump is communicated with the lower part of the desalting chamber; the cathode chamber liquid inlet pump is communicated with the upper part of the cathode chamber, and the cathode chamber liquid outlet pump is communicated with the lower part of the cathode chamber.
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